Today I followed a link to an interesting Python application I have not seen mentioned here before: http://solipsis.netofpeers.net/wiki/HomePage/.
"A peer-to-peer system for a massively multi-participant virtual world " It is a France Telecom R&D project, LGPL licenced, still in alpha, built on Python, Twisted, WxPthon, PIL, and probably other components actual or considered. The new Node software, rewritten with Twisted, was released yesterday. Terry J. Reedy -- http://mail.python.org/mailman/listinfo/python-list